Ask An Astronomer Answer Archive

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  1. What would happen if I put my arm out in space without a space suit?
  2. If your skin was exposed in space and you bled would your blood be blue from lack of oxygen?
  3. How long would it take us to travel to Alpha Centauri?
  4. Why can't we go faster than the speed of light? Can we ever colonize other planets?
  5. What are some major challenges of human space exploration?
  6. What happens to "dead" satellites orbiting the Earth?
  7. What kind of damage do solar storms cause to satellites?